Pump



Nov. 7, 1944. M, o. SCHREITER PUMP' I Filed May 6, 194a 4 Sheets-Sheet 1 112m 0. gschreiier,

IN VEN TOR.

ATID R N EYS Nov. 7, 1944; scHRElTER 2,362,411

PUMP

Filed May 6, 1943 4 Sheets-Sheet 2 m Mam-w;

I N VEN TOR.

AI'TDRNEYB Nov. 7, 1944.. M. oi SCZHREITER vPUMP Filed May 6, 1943 4 Sheets-Sheet s IMI s fig Q 6t INVENTOR.

ArruNEYs Nov. 7, 1944, SCHREITER PUMP Filed May 6, 1943 4 Sheets-Sheet 4 VINVIENTOR.

Patented Nov. 7, 1944 UNITED STATES PATENT OFFICE 1 PUMP Max 0. Schreiter, Peoria,

Application May 6, 1943, Serial No. 485,909

1 Claims. (cams-) My invention relates to pumps, and has among its objects and advantages the provision of an improved pump designed to develop power which may be utilized for operating liquid engines and the like, in addition to serving as a general purpose pump.

In the accompanying drawings:

Figure 1 is a vertical sectional view of the p mp. 1

Figure 2 is a horizontal sectional view.

Figure 3 is a vertical sectional view illustrating a pump plunger actuating means.

I Figure 4 is a vertical sectional view illustrating a cam driving means.

\ Figure 5 is a sectional view of a, gear pump and pressure relief valve, and i Figure 6 is a detail view of the gear pump.

which the supply line 62 is attached by a coupling unit 16. with the cavity 48. A compression spring 18 yieldingly holds a pressure relief valve 80 against a valve seat 82 about the port 68, which valve is normally seated but is lifted off its seat when the chamber 62 is completely filled with liquid so In the embodiment of the invention selected 32 rotatably supported in a bearing 34 attached to the side wall 36 of the body I0. Caps 38 are bolted at 40' to the walls and 28 and are provided with stufling boxes 42 which function as seals to prevent leakage of oil or other liquid to be pumped.

Both walls 20 and 28 are provided with relatively large openings. 44 to accommodate the bearings 24.

To the wall 36 is attached a boss 46 having a cavity 48 in which'vare housed meshing pump gears 50 and 52. The gear 52 i keyed to a shaft 54 .rotatably supported in a bearing 56 in the wall 36, the inner end of the shaft being provided with a small pinion 58 meshing with a larger pinion 60 keyed to the shaft end 32 for driving the shaft 54.

A tube 62 leading from a liquid source (not shown) has communication with the cavity 48, which cavity has communication with an outlet opening 64 extending through the wall 36. The chamber 66 in the body I0 is maintained full of oil or otherliquid employed in the power pumping system.

In Figure 5, the boss 46 is provided with a port 68 having communication with a passage I0 in a cover I2 bolted at .14 to the boss and to as to relieve the chamber from excessive pressure.

A screw plug 84 is threaded into the bore 86 which houses the spring I8 to constitute an abutment for the spring, and the springtension may be changed through adjustment of the plug.

The wall 20 is so spaced with respect to .the walls 28 and 36 as to provide a second chamber 88, in addition to the chamber 66. r A connecting rod 90 is pivotally connected at one end with the crank pin' 82 of the crank 30 and is arranged upright in the chamber. This rod is slidably mounted in a bore 94 in a rocker body 96. This rocker body is provided with coaxial shafts 98 rotatably' supported in bearings I00 attached to the walls 20 and 28. Thus actuation of the rod 90 through rotation of the crank 30 imparts an oscillatory motion to the body 96.

In Figure 3, the body 96 is provided with ears I02 pivotally connected at I04 with links I 06.

Th links I06 are located on opposite sides of the body96 and are'respectively pivotally connected at I08 with pump plungers I I0 slidable in bores I I2 in bosses II 4 on the side walls I I6 of the body I0. Caps II8 are bolted at I20 to the bosses II4, which caps are provided with recesses or chambers I-22.having communication with the respective bores II2. Bodies I24 are fixed to the respective caps I I8 and are provided with chambers I26 having communication with outlet tubes I28 leading to the engine (not shown) to be operated or to other types of machinery. The liquid or oil is discharged forcibly through the tubes I28 through reciprocation of the plungers IIO.

Figure 2 illustrates'the chambers I26 as being provided with screw plugs I30 of tubular formaunsea'ted in response to predetermined liquid pressures in the chambers I22. Such unseating takes place upon the pumping strokes of their respective plungers H0, and the bodies seat immediately as the plungers start on their retrac- The passage I0 has communication" tion stroke. Communication between the chambers I22 and the chamber 85 is established by bores I42 in the bosses I. These bores terminate in. chambers I44 provided with seats I45 to be engaged by valves I48. The chambers I44 are placed in communication with the chambers I22 axial movement on the stems I50. Thus the valves I48 are yieldingly biased to closed positions.

Heads I62 are attached to the stems I50 and engage a rotary cam I54 fixed to a shaft I56, see Figure 1, having shaft .ends I58'rotatably supported in bearings I'I0 on the walls 20 and 35. A sprocket I I2 is fixed to the shaft I55 and is driven by a chain I14 passing around a sprocket II fixed to the shaft end 32. A pulley'IIB is fixed to the shaft 22 for connection with a driving belt (not shown). Rotation of the shaft 22 actuates the pump gears 50 and 52 of Figure 6, the cam I64 and the body 95. I

The cam I54 is so arranged as to maintain the valves I48 in their closed positions during the power strokes of the plungers H0. The cam opens the valves upon the retraction of the strokes of the plungers I III to create suction conditions in the chambers I22 and I48 and the bores I42, to fill these cavities, so that the chambers I22 as well as available space in the bores II2 will be filled with oil or other liquid to be forced from the chambers I22 and into the outlet tube I28 upon the power strokes of the plungers I I0. One plunger H0 is under retraction as the other plunger is in its power phase. provided with openings I80 to pass liquid from The plugs I30 are body I0 and flanges or washers I50 keyed against communication chamber, reciprocating plungers for forcing liquid from said pressure chambers through the respective outlet tubes, valves controlling the flow of liquids from said chamber to said pressure supply chambers, an operating connection between said valves and said drive shaft for actuating the valves in timed relation with said plungers, and a rocker means operatively connecting said plungers and said drive shaft to reciprocate the plungers through rotation of the drive shaft. q

2. The invention described in claim 1 wherein said rocker means includes a rocker body havsaid pressure chambers are provided with valves biased to closed positions and opening only in response to predetermined liquid pressures for passing liquid to said outlet tubes.

5. A pump of the type described comprising a body having first and second chambers, a rotary shaft having portions thereof lying in said first and second chambers, a liquid pump communieating with the first chamber for maintaining a liquid supply therein, pressure chambers having communication with said first chamber an operating connection between said liquid pump and the plugs into the chambers I25 for delivery to I the outlet tubes I28.

The capacity of the pump gears and 52 is such as to maintain the chamber 55 full at all times. The plungers III) are arranged coaxially and are powerful, since the body 95 is located at some distance from the crank pin 82 so that a powerful leverage is imparted to the two plungers IIO through oscillation of the body 85.

The chamber 88 is also filled with oil. This chamber is effectively sealed by reason of the stuffing boxes 42. Since the chamber 88 is always full, the oil therein constitutes a backing or seal which prevents oil from leaking past the plungers IIO in the event of excessive wear thereon.

Without further elaboration, the foregoing will so fully explain my invention, that others may, by applying current knowledge. readily adapt the same for use under various conditions of service.

I claim:

1. A pump of the type described comprising a liquid supply chamber, a feed pump for maintaining a liquid supply in said chamber, a drive shaft having an operating connection with said pump, outlet tubes, pressure chambers having said shaft, said shaft having a crank located in said second chamber, a rocker body mounted in said second chamber and operatively connected with said crank to be rocked through rotation of the crank, liquid outlet tubes having communication with said pressure chambers, reciprocating plunger means operatively connected with said rocker body for forcing liquid through said outlet tubes, and valves operatively connected with said shaft for opening and closing communication between said first chamber and said pressure chambers in predetermined timed relationship with the reciprocatory motion of said plunger.

6. The invention described in claim 5 wherein said body is in the nature of a housing provided with a partition dividing the housing into said first and second chambers, and detachable bearings respectively attached to said partition and one wall of the housing to rotatably support said shaft.

'7. The invention described in claim 5 wherein said 'body is in the nature of a housing provided with a partition dividing the housing into said first and second chambers, detachable bearings respectively attached to said partition and one wall of the housing to rotatably support said shaft, and stuffing boxes associated 'with said bearings;

MAX 0. SCHREITER.

with said outlet tubes and said 

